/**
 ****************************************************************************************
 * @addtogroup HRPCTASK
 * @{
 ****************************************************************************************
 */

/*
 * INCLUDE FILES
 ****************************************************************************************
 */

#include "hrp_common.h"
#include "rwip_config.h"

#if (BLE_HR_COLLECTOR)
#include "attm.h"
#include "co_utils.h"
#include "gap.h"
#include "gattc_task.h"
#include "hrpc.h"
#include "hrpc_task.h"

#include "ke_mem.h"

/*
 * DEFINES
 ****************************************************************************************
 */

/// State machine used to retrieve heart rate service characteristics
/// information
const struct prf_char_def hrpc_hrs_char[HRPC_CHAR_MAX] = {
    /// Heart Rate Measurement
    [HRPC_CHAR_HR_MEAS] = {ATT_CHAR_HEART_RATE_MEAS, ATT_MANDATORY,
                           ATT_CHAR_PROP_NTF},
    /// Body Sensor Location
    [HRPC_CHAR_BODY_SENSOR_LOCATION] = {ATT_CHAR_BODY_SENSOR_LOCATION,
                                        ATT_OPTIONAL, ATT_CHAR_PROP_RD},
    /// Heart Rate Control Point
    [HRPC_CHAR_HR_CNTL_POINT] = {ATT_CHAR_HEART_RATE_CNTL_POINT, ATT_OPTIONAL,
                                 ATT_CHAR_PROP_WR},
};

/// State machine used to retrieve heart rate service characteristic description
/// information
const struct prf_char_desc_def hrpc_hrs_char_desc[HRPC_DESC_MAX] = {
    /// Heart Rate Measurement client config
    [HRPC_DESC_HR_MEAS_CLI_CFG] = {ATT_DESC_CLIENT_CHAR_CFG, ATT_MANDATORY,
                                   HRPC_CHAR_HR_MEAS},
};

/*
 * LOCAL FUNCTIONS DEFINITIONS
 ****************************************************************************************
 */

/**
 ****************************************************************************************
 * @brief Handles reception of the @ref GATTC_SDP_SVC_IND_HANDLER message.
 * The handler stores the found service details for service discovery.
 * @param[in] msgid Id of the message received (probably unused).
 * @param[in] param Pointer to the parameters of the message.
 * @param[in] dest_id ID of the receiving task instance (probably unused).
 * @param[in] src_id ID of the sending task instance.
 * @return If the message was consumed or not.
 ****************************************************************************************
 */
__STATIC int gattc_sdp_svc_ind_handler(ke_msg_id_t const msgid,
                                       struct gattc_sdp_svc_ind const *ind,
                                       ke_task_id_t const dest_id,
                                       ke_task_id_t const src_id) {
  uint8_t state = ke_state_get(dest_id);

  if (state == HRPC_DISCOVERING) {
    uint8_t conidx = KE_IDX_GET(dest_id);

    struct hrpc_env_tag *hrpc_env = PRF_ENV_GET(HRPC, hrpc);

    ASSERT_INFO(hrpc_env != NULL, dest_id, src_id);
    ASSERT_INFO(hrpc_env->env[conidx] != NULL, dest_id, src_id);

    if (hrpc_env->env[conidx]->nb_svc == 0) {
      // Retrieve HRS characteristics and descriptors
      prf_extract_svc_info(ind, HRPC_CHAR_MAX, &hrpc_hrs_char[0],
                           &hrpc_env->env[conidx]->hrs.chars[0], HRPC_DESC_MAX,
                           &hrpc_hrs_char_desc[0],
                           &hrpc_env->env[conidx]->hrs.descs[0]);

      // Even if we get multiple responses we only store 1 range
      hrpc_env->env[conidx]->hrs.svc.shdl = ind->start_hdl;
      hrpc_env->env[conidx]->hrs.svc.ehdl = ind->end_hdl;
    }

    hrpc_env->env[conidx]->nb_svc++;
  }

  return (KE_MSG_CONSUMED);
}

/**
 ****************************************************************************************
 * @brief Handles reception of the @ref HRPC_ENABLE_REQ message.
 * The handler enables the Heart Rate Profile Collector Role.
 * @param[in] msgid Id of the message received (probably unused).
 * @param[in] param Pointer to the parameters of the message.
 * @param[in] dest_id ID of the receiving task instance (probably unused).
 * @param[in] src_id ID of the sending task instance.
 * @return If the message was consumed or not.
 ****************************************************************************************
 */
__STATIC int hrpc_enable_req_handler(ke_msg_id_t const msgid,
                                     struct hrpc_enable_req const *param,
                                     ke_task_id_t const dest_id,
                                     ke_task_id_t const src_id) {
  // Status
  uint8_t status = PRF_ERR_REQ_DISALLOWED;
  // Get connection index
  uint8_t conidx = KE_IDX_GET(dest_id);

  uint8_t state = ke_state_get(dest_id);
  // Heart Rate Profile Client Role Task Environment
  struct hrpc_env_tag *hrpc_env = PRF_ENV_GET(HRPC, hrpc);
  ;

  ASSERT_INFO(hrpc_env != NULL, dest_id, src_id);
  // Config connection, start discovering
  if ((state == HRPC_IDLE) && (hrpc_env->env[conidx] == NULL)) {
    // allocate environment variable for task instance
    hrpc_env->env[conidx] = (struct hrpc_cnx_env *)ke_malloc(
        sizeof(struct hrpc_cnx_env), KE_MEM_ATT_DB);
    memset(hrpc_env->env[conidx], 0, sizeof(struct hrpc_cnx_env));

    // Config connection, start discovering
    if (param->con_type == PRF_CON_DISCOVERY) {
      // start discovering HRS on peer
      prf_disc_svc_send(&(hrpc_env->prf_env), conidx, ATT_SVC_HEART_RATE);

      hrpc_env->env[conidx]->last_uuid_req = ATT_SVC_HEART_RATE;

      // Go to DISCOVERING state
      ke_state_set(dest_id, HRPC_DISCOVERING);
    }
    // normal connection, get saved att details
    else {
      hrpc_env->env[conidx]->hrs = param->hrs;
      // send APP confirmation that can start normal connection to TH
      hrpc_enable_rsp_send(hrpc_env, conidx, GAP_ERR_NO_ERROR);
    }

    status = GAP_ERR_NO_ERROR;
  }

  // send an error if request fails
  if (status != GAP_ERR_NO_ERROR) {
    hrpc_enable_rsp_send(hrpc_env, conidx, status);
  }

  return (KE_MSG_CONSUMED);
}

/**
 ****************************************************************************************
 * @brief Handles reception of the @ref GATTC_CMP_EVT message.
 * This generic event is received for different requests, so need to keep track.
 * @param[in] msgid Id of the message received (probably unused).
 * @param[in] param Pointer to the parameters of the message.
 * @param[in] dest_id ID of the receiving task instance (probably unused).
 * @param[in] src_id ID of the sending task instance.
 * @return If the message was consumed or not.
 ****************************************************************************************
 */
__STATIC int gattc_cmp_evt_handler(ke_msg_id_t const msgid,
                                   struct gattc_cmp_evt const *param,
                                   ke_task_id_t const dest_id,
                                   ke_task_id_t const src_id) {
  // Get the address of the environment
  struct hrpc_env_tag *hrpc_env = PRF_ENV_GET(HRPC, hrpc);
  // Status
  uint8_t status;

  if (hrpc_env != NULL) {
    uint8_t conidx = KE_IDX_GET(dest_id);
    uint8_t state = ke_state_get(dest_id);

    if (state == HRPC_DISCOVERING) {
      status = param->status;

      if ((status == ATT_ERR_ATTRIBUTE_NOT_FOUND) ||
          (status == ATT_ERR_NO_ERROR)) {
        // Discovery
        // check characteristic validity
        if (hrpc_env->env[conidx]->nb_svc == 1) {
          status = prf_check_svc_char_validity(
              HRPC_CHAR_MAX, hrpc_env->env[conidx]->hrs.chars, hrpc_hrs_char);
        }
        // too much services
        else if (hrpc_env->env[conidx]->nb_svc > 1) {
          status = PRF_ERR_MULTIPLE_SVC;
        }
        // no services found
        else {
          status = PRF_ERR_STOP_DISC_CHAR_MISSING;
        }

        // check descriptor validity
        if (status == GAP_ERR_NO_ERROR) {
          status = prf_check_svc_char_desc_validity(
              HRPC_DESC_MAX, hrpc_env->env[conidx]->hrs.descs,
              hrpc_hrs_char_desc, hrpc_env->env[conidx]->hrs.chars);
        }
      }

      hrpc_enable_rsp_send(hrpc_env, conidx, status);
    }

    else if (state == HRPC_BUSY) {
      switch (param->operation) {
      case GATTC_WRITE:
      case GATTC_WRITE_NO_RESPONSE: {
        uint16_t rsp_msg_id = HRPC_CFG_INDNTF_RSP;
        if (hrpc_env->env[conidx]->last_char_code !=
            HRPC_DESC_HR_MEAS_CLI_CFG) {
          rsp_msg_id = HRPC_WR_CNTL_POINT_RSP;
        }

        struct hrpc_cfg_indntf_rsp *rsp = KE_MSG_ALLOC(
            rsp_msg_id, prf_dst_task_get(&(hrpc_env->prf_env), conidx), dest_id,
            hrpc_cfg_indntf_rsp);
        rsp->status = param->status;
        // Send the message
        ke_msg_send(rsp);
      } break;

      case GATTC_READ: {
        if (param->status != GAP_ERR_NO_ERROR) {
          // an error occurs while reading peer device attribute
          prf_client_att_info_rsp((prf_env_t *)hrpc_env->env[conidx], conidx,
                                  HRPC_RD_CHAR_RSP, param->status, NULL);
        }
      } break;

      default:
        break;
      }

      ke_state_set(prf_src_task_get(&hrpc_env->prf_env, conidx), HRPC_IDLE);
    }
  }
  return (KE_MSG_CONSUMED);
}

/**
 ****************************************************************************************
 * @brief Handles reception of the @ref HRPC_RD_DATETIME_REQ message.
 * Check if the handle exists in profile(already discovered) and send request,
 *otherwise error to APP.
 * @param[in] msgid Id of the message received (probably unused).
 * @param[in] param Pointer to the parameters of the message.
 * @param[in] dest_id ID of the receiving task instance (probably unused).
 * @param[in] src_id ID of the sending task instance.
 * @return If the message was consumed or not.
 ****************************************************************************************
 */
__STATIC int hrpc_rd_char_req_handler(ke_msg_id_t const msgid,
                                      struct hrpc_rd_char_req const *param,
                                      ke_task_id_t const dest_id,
                                      ke_task_id_t const src_id) {
  uint8_t state = ke_state_get(dest_id);
  uint8_t status = PRF_ERR_REQ_DISALLOWED;
  // Message status
  uint8_t msg_status = KE_MSG_CONSUMED;
  // Get the address of the environment
  struct hrpc_env_tag *hrpc_env = PRF_ENV_GET(HRPC, hrpc);
  // Get connection index
  uint8_t conidx = KE_IDX_GET(dest_id);

  if (state == HRPC_IDLE) {
    ASSERT_INFO(hrpc_env != NULL, dest_id, src_id);
    // environment variable not ready
    if (hrpc_env->env[conidx] == NULL) {
      status = PRF_APP_ERROR;
    } else {
      uint16_t search_hdl = ATT_INVALID_SEARCH_HANDLE;

      if (((param->char_code & HRPC_DESC_MASK) == HRPC_DESC_MASK) &&
          ((param->char_code & ~HRPC_DESC_MASK) < HRPC_DESC_MAX)) {
        search_hdl = hrpc_env->env[conidx]
                         ->hrs.descs[param->char_code & ~HRPC_DESC_MASK]
                         .desc_hdl;
      } else if (param->char_code < HRPC_CHAR_MAX) {
        search_hdl = hrpc_env->env[conidx]->hrs.chars[param->char_code].val_hdl;
      }

      // check if handle is viable
      if (search_hdl != ATT_INVALID_SEARCH_HANDLE) {
        // Store the command
        hrpc_env->env[conidx]->last_char_code = param->char_code;
        // Send the read request
        prf_read_char_send(&(hrpc_env->prf_env), conidx,
                           hrpc_env->env[conidx]->hrs.svc.shdl,
                           hrpc_env->env[conidx]->hrs.svc.ehdl, search_hdl);

        // Go to the Busy state
        ke_state_set(dest_id, HRPC_BUSY);

        status = ATT_ERR_NO_ERROR;
      } else {
        status = PRF_ERR_INEXISTENT_HDL;
      }
    }
  } else if (state == HRPC_FREE) {
    status = GAP_ERR_DISCONNECTED;
  } else {
    // Another procedure is pending, keep the command for later
    msg_status = KE_MSG_SAVED;
    status = GAP_ERR_NO_ERROR;
  }

  if (status != GAP_ERR_NO_ERROR) {
    prf_client_att_info_rsp(&hrpc_env->prf_env, conidx, HRPC_RD_CHAR_RSP,
                            status, NULL);
  }

  return (msg_status);
}

/**
 ****************************************************************************************
 * @brief Handles reception of the @ref GATTC_READ_IND message.
 * Generic event received after every simple read command sent to peer server.
 * @param[in] msgid Id of the message received (probably unused).
 * @param[in] param Pointer to the parameters of the message.
 * @param[in] dest_id ID of the receiving task instance (probably unused).
 * @param[in] src_id ID of the sending task instance.
 * @return If the message was consumed or not.
 ****************************************************************************************
 */
__STATIC int gattc_read_ind_handler(ke_msg_id_t const msgid,
                                    struct gattc_read_ind const *param,
                                    ke_task_id_t const dest_id,
                                    ke_task_id_t const src_id) {
  // Get the address of the environment
  struct hrpc_env_tag *hrpc_env = PRF_ENV_GET(HRPC, hrpc);
  // Get connection index
  uint8_t conidx = KE_IDX_GET(dest_id);

  prf_client_att_info_rsp(&hrpc_env->prf_env, conidx, HRPC_RD_CHAR_RSP,
                          GAP_ERR_NO_ERROR, param);

  return (KE_MSG_CONSUMED);
}

/**
 ****************************************************************************************
 * @brief Handles reception of the @ref HRPC_CFG_INDNTF_REQ message.
 * It allows configuration of the peer ind/ntf/stop characteristic for a
 *specified characteristic. Will return an error code if that cfg char does not
 *exist.
 * @param[in] msgid Id of the message received (probably unused).
 * @param[in] param Pointer to the parameters of the message.
 * @param[in] dest_id ID of the receiving task instance (probably unused).
 * @param[in] src_id ID of the sending task instance.
 * @return If the message was consumed or not.
 ****************************************************************************************
 */
__STATIC int hrpc_cfg_indntf_req_handler(
    ke_msg_id_t const msgid, struct hrpc_cfg_indntf_req const *param,
    ke_task_id_t const dest_id, ke_task_id_t const src_id) {
  // Get the address of the environment
  struct hrpc_env_tag *hrpc_env = PRF_ENV_GET(HRPC, hrpc);
  // Get connection index
  uint8_t conidx = KE_IDX_GET(dest_id);
  // Status
  uint8_t status = PRF_ERR_REQ_DISALLOWED;

  // Message status
  uint8_t msg_status = KE_MSG_CONSUMED;
  uint8_t state = ke_state_get(dest_id);

  if (state == HRPC_IDLE) {
    if (hrpc_env->env[conidx] != NULL) {

      // Status
      status = PRF_ERR_INVALID_PARAM;
      // Check if parameter is OK
      if ((param->cfg_val == PRF_CLI_STOP_NTFIND) ||
          (param->cfg_val == PRF_CLI_START_NTF)) {
        // Status
        status = PRF_ERR_INEXISTENT_HDL;
        // Get handle of the client configuration
        uint16_t cfg_hdl = hrpc_env->env[conidx]
                               ->hrs.descs[HRPC_DESC_HR_MEAS_CLI_CFG]
                               .desc_hdl;
        // check if the handle value exists
        if (cfg_hdl != ATT_INVALID_SEARCH_HANDLE) {
          hrpc_env->env[conidx]->last_char_code = HRPC_DESC_HR_MEAS_CLI_CFG;

          status = GAP_ERR_NO_ERROR;
          // Go to the Busy state
          ke_state_set(dest_id, HRPC_BUSY);
          // Send GATT Write Request
          prf_gatt_write_ntf_ind(&hrpc_env->prf_env, conidx, cfg_hdl,
                                 param->cfg_val);
        }
      }
    } else {
      status = PRF_APP_ERROR;
    }
  } else if (state == HRPC_FREE) {
    status = GAP_ERR_DISCONNECTED;
  } else {
    // Another procedure is pending, keep the command for later
    msg_status = KE_MSG_SAVED;
    status = GAP_ERR_NO_ERROR;
  }

  if (status != GAP_ERR_NO_ERROR) {
    struct hrpc_cfg_indntf_rsp *rsp =
        KE_MSG_ALLOC(HRPC_CFG_INDNTF_RSP, src_id, dest_id, hrpc_cfg_indntf_rsp);
    rsp->status = status;
    // Send the message
    ke_msg_send(rsp);
  }

  return (msg_status);
}

/**
****************************************************************************************
* @brief Handles reception of the @ref HRPC_WR_CNTL_POINT_REQ message.
* Check if the handle exists in profile(already discovered) and send request,
*otherwise error to APP.
* @param[in] msgid Id of the message received (probably unused).
* @param[in] param Pointer to the parameters of the message.
* @param[in] dest_id ID of the receiving task instance (probably unused).
* @param[in] src_id ID of the sending task instance.
* @return If the message was consumed or not.
****************************************************************************************
*/
__STATIC int hrpc_wr_cntl_point_req_handler(
    ke_msg_id_t const msgid, struct hrpc_wr_cntl_point_req const *param,
    ke_task_id_t const dest_id, ke_task_id_t const src_id) {
  // Get the address of the environment
  struct hrpc_env_tag *hrpc_env = PRF_ENV_GET(HRPC, hrpc);
  // Get connection index
  uint8_t conidx = KE_IDX_GET(dest_id);
  uint8_t status = GAP_ERR_NO_ERROR;

  // Message status
  uint8_t msg_status = KE_MSG_CONSUMED;
  uint8_t state = ke_state_get(dest_id);

  if (state == HRPC_IDLE) {
    // this is mandatory readable if it is included in the peer's DB
    if (hrpc_env->env[conidx] != NULL) {
      // this is mandatory readable if it is included in the peer's DB
      if (hrpc_env->env[conidx]->hrs.chars[HRPC_CHAR_HR_CNTL_POINT].char_hdl !=
          ATT_INVALID_SEARCH_HANDLE) {
        if ((hrpc_env->env[conidx]->hrs.chars[HRPC_CHAR_HR_CNTL_POINT].prop &
             ATT_CHAR_PROP_WR) == ATT_CHAR_PROP_WR) {
          hrpc_env->env[conidx]->last_char_code = HRPC_CHAR_HR_CNTL_POINT;

          // Send GATT Write Request
          prf_gatt_write(
              &hrpc_env->prf_env, conidx,
              hrpc_env->env[conidx]->hrs.chars[HRPC_CHAR_HR_CNTL_POINT].val_hdl,
              (uint8_t *)&param->val, sizeof(uint8_t), GATTC_WRITE);
          // Go to the Busy state
          ke_state_set(dest_id, HRPC_BUSY);
        }
        // write not allowed, so no point in continuing
        else {
          status = PRF_ERR_NOT_WRITABLE;
        }
      }
      // send app error indication for inexistent handle for this characteristic
      else {
        status = PRF_ERR_INEXISTENT_HDL;
      }
    } else {
      status = PRF_APP_ERROR;
    }
  } else if (state == HRPC_FREE) {
    status = GAP_ERR_DISCONNECTED;
  } else {
    // Another procedure is pending, keep the command for later
    msg_status = KE_MSG_SAVED;
    status = GAP_ERR_NO_ERROR;
  }

  if (status != GAP_ERR_NO_ERROR) {
    struct hrpc_wr_cntl_point_rsp *rsp = KE_MSG_ALLOC(
        HRPC_WR_CNTL_POINT_RSP, src_id, dest_id, hrpc_wr_cntl_point_rsp);
    rsp->status = status;
    // Send the message
    ke_msg_send(rsp);
  }

  return (msg_status);
}

/**
 ****************************************************************************************
 * @brief Handles reception of the @ref GATTC_EVENT_IND message.
 * @param[in] msgid Id of the message received (probably unused).
 * @param[in] param Pointer to the parameters of the message.
 * @param[in] dest_id ID of the receiving task instance (probably unused).
 * @param[in] src_id ID of the sending task instance.
 * @return If the message was consumed or not.
 ****************************************************************************************
 */
__STATIC int gattc_event_ind_handler(ke_msg_id_t const msgid,
                                     struct gattc_event_ind const *param,
                                     ke_task_id_t const dest_id,
                                     ke_task_id_t const src_id) {
  uint8_t conidx = KE_IDX_GET(dest_id);
  // Get the address of the environment
  struct hrpc_env_tag *hrpc_env = PRF_ENV_GET(HRPC, hrpc);

  if (hrpc_env != NULL) {
    if ((param->handle ==
         hrpc_env->env[conidx]->hrs.chars[HRPC_CHAR_HR_MEAS].val_hdl) &&
        (param->type == GATTC_NOTIFY)) {
      // build a HRPC_HR_MEAS_IND message with stable heart rate value code.
      struct hrpc_hr_meas_ind *ind = KE_MSG_ALLOC(
          HRPC_HR_MEAS_IND, prf_dst_task_get(&(hrpc_env->prf_env), conidx),
          prf_src_task_get(&(hrpc_env->prf_env), conidx), hrpc_hr_meas_ind);

      // unpack heart rate measurement.
      hrpc_unpack_meas_value(&(ind->meas_val), (uint8_t *)param->value,
                             param->length);

      ke_msg_send(ind);
    }
  }
  return (KE_MSG_CONSUMED);
}

/*
 * GLOBAL VARIABLE DEFINITIONS
 ****************************************************************************************
 */
/// Specifies the default message handlers
KE_MSG_HANDLER_TAB(hrpc){
    {GATTC_SDP_SVC_IND, (ke_msg_func_t)gattc_sdp_svc_ind_handler},
    {HRPC_ENABLE_REQ, (ke_msg_func_t)hrpc_enable_req_handler},
    {GATTC_CMP_EVT, (ke_msg_func_t)gattc_cmp_evt_handler},
    {HRPC_CFG_INDNTF_REQ, (ke_msg_func_t)hrpc_cfg_indntf_req_handler},
    {GATTC_EVENT_IND, (ke_msg_func_t)gattc_event_ind_handler},
    {HRPC_RD_CHAR_REQ, (ke_msg_func_t)hrpc_rd_char_req_handler},
    {GATTC_READ_IND, (ke_msg_func_t)gattc_read_ind_handler},
    {HRPC_WR_CNTL_POINT_REQ, (ke_msg_func_t)hrpc_wr_cntl_point_req_handler},
};

void hrpc_task_init(struct ke_task_desc *task_desc) {
  // Get the address of the environment
  struct hrpc_env_tag *hrpc_env = PRF_ENV_GET(HRPC, hrpc);

  task_desc->msg_handler_tab = hrpc_msg_handler_tab;
  task_desc->msg_cnt = ARRAY_LEN(hrpc_msg_handler_tab);
  task_desc->state = hrpc_env->state;
  task_desc->idx_max = HRPC_IDX_MAX;
}

#endif /* (BLE_HR_COLLECTOR) */
/// @} HRPCTASK